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Meiosis: Reduction Division

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Estimated time: 2 minutes
  • Key Points: Meiosis
CBSE: Class 12
Maharashtra State Board: Class 10
CISCE: Class 10

Key Points: Meiosis

  • Meiosis is a specialised reduction division that produces four haploid daughter cells with half the chromosome number.
  • It involves two sequential divisions (Meiosis I and II) but only one round of DNA replication during interphase.
  • Occurs during gametogenesis — in humans (testes and ovaries) and in plants (anthers and ovaries).
  • It includes pairing of homologous chromosomes and crossing over, leading to genetic recombination.
  • Maintains chromosome number across generations by alternating haploid and diploid phases; fertilisation restores the diploid (2n) condition.

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